Project map

The project details showing the Map size and the Location (World reference Point) of a project

The project map is the rectangular data space of your project. It is defined by a width and a height. Its location is defined by a world reference point, which is a coordinate relative to the EPSG:3857 WGS 84 / Pseudo-Mercator coordinate system.

The width and height are stored in the MAP_SIZE_M Setting item as an array of two Integers, representing the width and height. The world reference point is stored in the WORLD_REFERENCE_POINT Setting item as an array of two Doubles, representing X and Y.

When a project is generated, or new features are imported or drawn in a session, they are required to intersect with the project map. Only its intersection with this project map is imported. This holds for practically all items, with the exception of Height Sectors and Terrains.

Surrounding Map Bounds

The project map (red) and its surrounding map (satellite). Notice the satellite images and its corresponding height sectors and severally water bodies as terrains.

When zooming out to view the project map, you 'll notice that there is a region surrounding the project map that is covered with satellite images, Height sector information and terrain data. These provide some extra sense of orientation and lead to a more pleasantly looking boundary of your project.

The surrounding map extend is stored as a setting, SURROUNDING_MAP_EXTEND_M, which defines the extra boundary distances around the project map. Its total dimensions are calculated as: $\begin{array}{cc}{x}_s& =d_x\cdot 2+x_m\\ y_s& =d_y\cdot 2+y_m\end{array}$

where:

$x_s\text{ and }{y}_s$ are the dimensions of the surrounding map extends.

$d_x\text{ and }{d}_y$ are the configured distances around the project map, stored in the setting SURROUNDING_MAP_EXTEND_M.

$x_m\text{ and }{y}_m$ are the project map dimensions, stored in the setting MAP_SIZE_M.